Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chuc danh » chuc nganh, thuc hanh, chuc nang
hanh tang » hanh trang, anh tang, hanh mang
hang cong » dang cong, hang nong, bang cong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap
tang va » trang va, tang van, thang va
va hang » van hang, va nang, va lang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chuc danh) or (chieu sach)) - hanh tang va hang cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chuc danh) OR (chieu sach)) - hanh tang va hang cong dan than cao.
• Adding a wildcard symbol may retrieve word variants: theo ((chuc danh) or (chieu sach)) - hanh tang va hang cong dan than cao*.